Liam Doyle is now the St. Louis Cardinals' No. 1 overall prospect and it didn't take him long to impress with the new title. Doyle officially moved into the top spot in the Cardinals' farm system this past week as JJ Wetherholt graduated from prospect status. The 21-year-old left took the hill on Saturday for Double-A Springfield and responded with arguably his best start of the season so far. The young lefty struggled a bit in his first two starts of the season as he attempted to develop and work his secondary pitches into game action. Now, he looks much more like the young flamethrower the club drafted last year with the No. 5 overall pick in the 2025 Major League Baseball Draft. On Saturday, Doyle pitched five innings against the Corpus Christi Hooks and struck out eight batters and allowed two runs across 81 pitches. That's not all, though. There was a point in the contest in which he retired 11 straight batters. Plus, the eight strikeouts set a new career high for the 21-year-old.…